High efficiency tissue specific compound delivery system using streptavidin-protein a fusion protein

摘要

The present invention relates to methods and compositions that can be employed to introduce toxins and nucleic acids into the cytoplasm or nucleus of a eukaryotic cell, particularly a cell of a higher vertebrate. The invention particularly concerns the use of a fusion protein of streptavidin and protein A sequences to form a non-covalent complex of a toxin or nucleic acid and an antibody.